What's being poor got to do with being neglected as a child? Are you saying only poor people can neglect their kids? Or that poverty makes it more likely? What?
See, the arguments aren't as simple as you make out. However, there is evidence to show that abuse and neglect as a child affects brain development, personality development and makes anti-social behaviour more likely. It's a bit complex, to do with attachment theory, emotional regulation, cortisol levels etc but I can recommend Sue Gerhardt's book "Why Love Matters" for a good overview.
Interesting thing is, when I last went on about this and posted up a load of references, KJB agreed with almost everything I said. How quickly he forget and reverts to type!